Refrigerating display stand



March 5, 1940. c. LJUSTHEIM 2,192,746

REFRIGERATING DISPLAY STAND Filed Dec. 6, 1937 3mm Clarence I Jame/2 Patented Mar. 5, 1940 UNITED STATES PATENT OFFICE 2 Claims.

My invention relates to fruit and vegetable display stands for markets, grocery stores and the like and has for its object to provide a new and highly efllcient refrigerated, and air conditioned stand.

A further object isto provide a refrigerated shelved fruit and vegetable display stand which is air conditioned, and kept cool at all times by the use of a mechanical refrigerator element l'J using coils and finned coils to cool the air as it is forced through the stand and up to the articles displayed thereon.

A still further object is to provide a refrigerated, aerated, vegetable stand having means is to introduce a spray of water up onto the vegetables as needed to keep them perfectly without drying them out.

This application is an improvement and continuation in part of my co-pending application 30 for Refrigerated display stands, filed Sept. 7, 1937, Serial No. 162,621, using an electrically driven mechanical refrigerating element instead of the compressed gas used in my former application.

These objects I accomplish with the device illustrated in the accompanying'drawing in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in the appended claims.

In the drawing in which I have shown my in: vention Figure l is a perspective view of my display stand parts cut away.

Figure 2 is a diagrammatic view of a section transversely of the stand with the refrigerant liquefying unit shown removed and set therebelow for clarity.

Figure 3 shows a diagram of the refrigeration finned coil showing where the pipes connect from the refrigerant liquefying unit.

In the drawing I have shown the case for the stand as A, having step like front B, with separate shelves 5, 6, and "i forming the front B. A

is refrigerant liquefying unit C such as is commonly used in larger types of refrigerators and meat display cabinets is then mounted in one end of the stand with a pipe it leading from the high pressure end of the refrigerant liquefying unit C to carry the cold refrigerant to contact each step of the stand in longitudinal coils orpipes H, and vertical coils l2 set along the vertical portion of each step, and each step is preferably made with the top perforated or of screen 65 mesh material D. The circuit is completed by joining all of these coils together to a return flow pipe l2 which carries the fluid back to the refrigerant liquefying unit.

At one end of the casing or stand A, there is an air cleaner and circulator E which consists I of a rectangular casing l4 carrying a rotary blower shown in dotted lines 15. The top of the casing I4 is open and carries an air filter or removable air cleaning strainer lfi therein and if desired this filter may be set below the level of 10 the opening and a protection screen set thereabove. This cleans all air which is passed through the blower into the stand. The blower is open to the interior of the stand to blow air through the case, and is driven by a sheave wheel H, a lid belt I9 and a motor within the stand. This may be the same motor as that used to drive the refrigerating element if desired.

Inside the stand there are suitable deflector plates 29, 2f, 22 and 23, to drive the air to the upper two shelves, and other like bafies 24, 2t,

26 and 21 to further distribute the air to these two upper shelves or steps and to the lower step,

to cause the air to pass up through each screen or perforate step with equal velocity. This air 25 is cooled as it enters the stand and passes over the coils II and I2 and to aid in quickly reducing the temperature of the incoming air,

I provide a vertical finned coil 3t mounted directly in front of the blower discharge into the so stand and which finned coil is connected in the same circuit as that of the pipe It where needed to quickly cool the air as it passes directly out of the blower.

As shown in Figure 2 if it is desired to keep the as vegetables damp in the stand, water pipes P may be installed along one or both edges of the trays or screen shelves with small openings therein to direct the spray of water inwardly to meet the passing air as it is forced up through the shelves M and vegetables to carry this moisture onto the vegetables and with this combination therewill never be any danger of the vegetables sweating or spoiling on the underside of the trays or shelves, as .is quite common with the stands as used today.

Having thus described my invention I desire to secure by Letters Patent and claim:

1. In a display stand of the class described, the combination of a closed casing having the to front formed into shelves on different elevations; perforate bases in said shelves; a refrigerant llquefying unit; coils connected with said unit said coils being mounted back' of and under each shelf; a finned coil mounted in connection with said coils;-a blower mounted in one end of said casing to blow air through said finned coil. and around saidcoils near the shelves and out through the perforate shelves to provide cold refrigerated air for the contents of the shelves; and means to clean the air entering said blower.

2. In a refrigerant display stand of the class described, the combination of a closed casing having the front formed into step-like shelves;

perforate bases in said shelves; a blower to (time air into said casing and out of said perforate shelves; baliles to distribute the air throughout the casing evenly; cooling coils mounted adjacent each shelf to cool the air as it is blown out of the casing through the bottom of said shelves; and means to introduce refrigerant liquid into said coils. a

CLARENCE I. Jus'rrmm. 

